Earphone Line Control Device and Earphone

ABSTRACT

An earphone line control device includes a power supply management unit, a filter unit, a switching circuit and a control unit. The switching circuit includes a switch in series with a resistance, a first end of the power supply management unit and an end of the filter unit are both connected to a power supply, a second end of the power supply management unit is connected to a first end of the control unit, the other end of the filter unit is connected to a second end of the control unit, a third end of the power supply management unit is connected to ground, a third end of the control unit is connected to ground, an end of the resistance is connected to the power supply, the other end of the resistance is in series with an end of the switch and connected to a fifth end of the control unit, and the other end of the switch is connected to a forth end of the control unit. When the switch is turned off, the control unit outputs a preset coded pulse signal.

FIELD OF THE INVENTION

The invention relates to a field of earphone, and more particularlyrelates to an earphone line control device and an earphone.

BACKGROUND OF THE INVENTION

Due to the development of terminal technique, more and more terminaldevices appear nowadays. In order to provide the terminal device with anenhanced processing ability and more functions, operating systems forterminal devices are developed. Currently, there are a variety ofoperating systems, of which the most widely used systems are Android,iOS, Symbian, Windows Phone, and BlackBerry OS.

Mobile phones with different operating systems require differentearphones, which cause an earphone fail to be applied to differentmobile phones. For example, an earphone provided for an Android mobilephone cannot be applied to an mobile phone with iOS operation system,and vice versa.

SUMMARY OF THE INVENTION

Accordingly, it is necessary to provide an earphone line control deviceand an earphone to enable the earphone to be generally applied toterminal devices of different operating systems.

An earphone line control device includes a power supply management unit,a filter unit, a switching circuit and a control unit. The switchingcircuit includes a switch in series with a resistance, a first end ofthe power supply management unit and an end of the filter unit are bothconnected to a power supply, a second end of the power supply managementunit is connected to a first end of the control unit, the other end ofthe filter unit is connected to a second end of the control unit, athird end of the power supply management unit is connected to ground, athird end of the control unit is connected to ground, an end of theresistance is connected to the power supply, the other end of theresistance is in series with an end of the switch and connected to afifth end of the control unit, and the other end of the switch isconnected to a forth end of the control unit. When the switch is turnedoff, the control unit outputs a preset coded pulse signal.

In an embodiment, the line control device further includes a customswitch circuit, when the switch in the custom switch circuit is turnedoff, the control unit outputs a preset coded audio signal.

In an embodiment, when the switches in different switch circuits areturned off, the control unit respectively outputs different preset codedaudio signals.

In an embodiment, the power supply management unit includes a diode, asecond resistance and a power supply capacitance; an anode of the diode,an end of the second resistance, and an end of the power supplycapacitance are all connected to the power supply, a cathode of thediode and the other end of the second resistance are both connected tothe first end of the control unit, and the other end of the power supplycapacitance is connected to ground.

An earphone line control device includes a power supply management unit,a filter unit, a switching circuit and a control unit. The switchingcircuit includes a switch and a resistance, a first end of the powersupply management unit and an end of the filter unit are both connectedto a power supply, a second end of the power supply management unit isconnected to a first end of the control unit, the other end of thefilter unit is connected to a second end of the control unit, a thirdend of the power supply management unit is connected to ground, a thirdend of the control unit is connected to ground, an end of the resistanceis connected to the power supply, the other end of the resistance isconnected to a sixth end of the control unit, an end of the switch isconnected to a seventh end of the control unit, and the other end of theswitch is connected to ground. When the switch is turned off, thecontrol unit outputs a preset coded pulse signal.

In an embodiment, the line control device further includes a customswitch circuit, when the switch in the custom switch circuit is turnedoff, the control unit outputs a preset coded audio signal.

In an embodiment, when the switches in different switch circuits areturned off, the control unit respectively outputs different preset codedaudio signals.

In an embodiment, the power supply management unit includes a diode, asecond resistance and a power supply capacitance; an anode of the diode,an end of the second resistance and an end of the power supplycapacitance are all connected to the power supply, a cathode of thediode and the other end of the second resistance are both connected tothe first end of the control unit, and the other end of the capacitanceis connected to ground.

An earphone includes the earphone line control device according toanyone of the prior embodiments.

The earphone line control device and the earphone can enable theearphone to be generally applied to terminal devices of at least twodifferent operating systems.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the manner in which the above-recited and otheradvantages and features can be obtained, a more particular descriptionof the subject matter briefly described above will be rendered byreference to specific embodiments which are illustrated in the appendeddrawings. Understanding that these drawings depict only typicalembodiments and are not therefore to be considered to be limiting inscope, embodiments will be described and explained with additionalspecificity and detail through the use of the accompanying drawings inwhich:

FIG. 1 is a block diagram of an earphone line control device inaccordance with an embodiment;

FIG. 2 is a block diagram of an earphone line control device inaccordance with another embodiment;

FIG. 3 is a block diagram of an earphone line control device inaccordance with another embodiment;

FIG. 4 is a block diagram of an earphone line control device inaccordance with another embodiment;

FIG. 5 is a block diagram of an earphone line control device inaccordance with another embodiment;

FIG. 6 is a block diagram of an earphone line control device inaccordance with another embodiment;

FIG. 7 is a block diagram of an earphone line control device inaccordance with another embodiment; and

FIG. 8 is a block diagram of an earphone line control device inaccordance with another embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiments of the invention are described more fully hereinafter withreference to the accompanying drawings. The various embodiments of theinvention may, however, be embodied in many different forms and shouldnot be construed as limited to the embodiments set forth herein. Rather,these embodiments are provided so that this disclosure will be thoroughand complete, and will fully convey the scope of the invention to thoseskilled in the art. Elements that are identified using the same orsimilar reference characters refer to the same or similar elements.

The present disclosure provides an earphone including a sound cavity, anearphone line control device, and a data line interconnecting the soundcavity and the earphone line control device. The earphone can be a wiredearphone or a Bluetooth earphone. For the wired earphone, the earphonefurther includes a plug.

Referring to FIG. 1, in an embodiment, the earphone line control deviceincludes a power supply management unit 100, a filter unit 200, aswitching circuit including a switch 500 in series with a resistance600, and a control unit 400. A first end 101 of the power supplymanagement unit 100, an end 201 of the filter unit 200, and an end ofthe resistance 600 are respectively connected to a power supply, asecond end 102 of the power supply management unit is connected to afirst end 401 of the control unit 400, the other end 202 of the filterunit 200 is connected to a second end 402 of the control unit 400, athird end 103 of the power supply management unit 100 is connected toground, a third end 403 of the control unit 400 is connected to ground,the other end of the resistance 600 is in series with an end of theswitch 500 and connected to a fifth end of the control unit, and theother end of the switch 500 is connected to a forth end 404 of thecontrol unit 400. When the switch 500 is turned off, the control unit400 outputs a preset coded pulse signal.

The forth end 404 of the control unit 400 is set to low level, when theswitch 500 is turned on, a lower end of the resistance 600 is at lowlevel. When the control unit 400 detects the low level, the control unit400 outputs nothing, the mobile phone connected with the earphoneautomatically identifies the voltage value of an upper end of theresistance, and an earphone function of operation system A isimplemented. When the switch 500 is turned off, the lower end of theresistance 600 is at high level. After the control unit 400 detects thehigh level, the control unit 400 outputs a preset coded pulse signal,the mobile phone connected to the earphone receives the preset codedpulse signal, and then executes a corresponding operation, such asproviding an earphone function of operation system B.

FIG. 2 shows another embodiment of the disclosure, in the embodiment,the power supply management unit 100 includes a diode D1, a secondresistance R5 and a power supply capacitance C2. An anode of the diodeD1, an end of the second resistance R5, and an end of the power supplycapacitance C2 are all connected to the power supply, a cathode of thediode D1 and the other end of the second resistance R5 are bothconnected to the first end 401 of the control unit 400, and the otherend of the power supply capacitance C2 is connected to ground.

The power supply management unit 100 is configured to provide stablepower for the control unit 400. The power supply capacitance C2 hasfunctions of stabilizing the voltage, following current and powersupplying for the control unit 400. Without the diode D1, the voltagemay be too low and the power supply capacitance C2 willelectro-discharge too fast, causing the control unit 300 to be crashed,and fail to work normally. The second resistance R5 is configured toboost the voltage of the power supply capacitance C2 to the outputvoltage value of the earphone plug of the mobile phone.

FIG. 3 shows another embodiment of the disclosure, in the embodiment,the filter unit 200 consists of a resistance R4 connecting in serieswith a capacitance C1.

FIG. 4 shows another embodiment of the disclosure, wherein the earphoneline control device has two switching circuits, one switching circuitincludes a resistance R1 and a switch S1, and the other switchingcircuit includes a resistance R2 and a switch S2. The switch S1 is a VOLDOWN (−) switch of the earphone line control device, and the switch S2is a VOL UP (+) switch of the earphone line control device. A switch S4is a PLAY/PAUSE switch, the control unit 400 detects if the switch S1 orthe switch S2 is turned off.

When the switch S1 or the switch S2 is turned on, the resistance R1 orthe resistance R2 divides voltage with an internal circuit of the mobilephone, and thus forms different voltage values, the mobile phonedistinguishes whether the switch S1 or the switch S2 is turned onaccording to the voltage values, so as to implement functions of volumeregulating or previous song / next song on an earphone of a kind ofoperation system (such as Android).

If the switch S1 or the switch S2 remains being turned on, the electricquantity of the power supply capacitance C2 will keep consuming. Afterthe switch S1 or switch S2 has been turned on for a time period over alimit value, the electric quantity of the power supply capacitance C2will be exhausted, thereby causing the control unit 400 to be crashed.Following schemes can be employed to avoid this problem:

When the control unit 400 supplies power normally, the forth end 404 ofthe control unit 400 is set to low level. When the switch S1 or theswitch S2 is turned on, the fifth end 405 of the control unitcorresponding to the switch S1 and the sixth end 406 the control unitcorresponding to the switch S2 are at low level, at this moment, thecontrol unit 400 will start counting. If the switch S1 or the switch S2is still turned on within a set time, the forth end 404 of the controlunit 400 will be set to high level, then the fifth end 405 and the sixthend 406 will change from low level to high level, and the control unit400 will output a coded pulse signal via the second end 402.

If the switch S1 or the switch S2 is turned off within the set time, thefifth end 405 and the sixth end 406 of the control unit 400 will changefrom low level to high level, and the control unit 400 will output acoded pulse signal via the second end 402.

When the switch S1 is turned off, the control unit 400 outputs a codedpulse signal of about 116 KHz (mid-range frequency signal of more than20 KHz); when the switch S2 is turned off, the control unit 400 outputsa coded pulse signal of about 154 KHz. The coupling filter circuit 200composed of the resistance R4 and the capacitance C2 superimposes thecoded pulse signal outputted by the control unit 400 to a main circuitand is feedback to the mobile phone connected with the earphone, themobile phone distinguishes the operation of the switch S1 or the switchS2 according to the coded pulse signals, so as to implement the volumeregulating or song move previous/move next operation of anotheroperation system (such as IOS).

FIG. 5 shows another embodiment of the disclosure, in the embodiment,the earphone line control device further includes a custom switchcircuit composed of a switch S3 and a resistance R3, an end of theresistance R3 is connected to the power supply, the other end of theresistance R3 is in series with the switch S3 and connected to thecontrol unit 400, connecting to an end of the control unit 400. When theswitch S3 is turned on or turned off, the control unit 400 outputs apreset coded audio signal, the coded audio signal is a low frequencystage signal in the range of 20-20 KHz, the mobile phone connected tothe earphone line control device decodes the coded audio signal, andimplements different functions set by a user by running differentapplications programs(App), e.g. Wechat voice messages, playing wechatvoice messages, taking photos, turning volume up/down, previoussong/next song, screen scraping, and voice controlling.

FIG. 6 is a block diagram of another earphone line control deviceprovided by the present disclosure. The earphone line control deviceincludes a power supply management unit 10, a filter unit 20, aswitching circuit including a switch 50 and a resistance 60, and acontrol unit 40. A first end 11 of the power supply management unit 10,an end 21 of the filter unit 20 and an end of the resistance 60 arerespectively connected to a power supply, a second end 12 of the powersupply management unit 10 is connected to a first end 41 of the controlunit 40, the other end 22 of the filter unit is connected to a secondend 42 of the control unit 40, a third end 13 of the power supplymanagement unit 10 is connected to ground, a third end 43 of the controlunit 40 is connected to ground, the other end of the resistance 60 isconnected to a sixth end 46 of the control unit 40, an end of the switch50 is connected to a seventh end 47 of the control unit 40, and theother end of the switch 50 is connected to ground.

When the switch 50 is turned on, the control unit 40 detects that theseventh end 47 is at low level, the control unit 40 set the sixth end 46of the control unit 40 corresponding to the resistance 60 to low level,and the control unit 40 outputs nothing, the mobile phone connected withthe earphone automatically identifies the voltage value of the upper endof the resistance 60, and the earphone function of the operation systemA is implemented. When the switch 50 is turned off, the control unit 40set the sixth end 46 corresponding to the resistance 60 to high level,the control unit 40 outputs a preset coded pulse signal, the mobilephone connected with the earphone receives the coded pulse signal, andthen executes corresponding operation, such as the earphone function ofthe operation system B.

In another embodiment of the disclosure, the power supply managementunit 10 includes a diode D1, a second resistance R5 and a power supplycapacitance C2. An anode of the diode D1, an end of the secondresistance R5, and an end of the power supply capacitance C2 are allconnected to the power supply, a cathode of the diode D1 and the otherend of the second resistance R5 are both connected to the first end 41of the control unit 40, and the other end of the power supplycapacitance C2 is connected to ground.

In another embodiment of the disclosure, the filter unit 20 consists ofa resistance R4 connecting in series with a capacitance C1.

FIG. 7 shows another embodiment of the disclosure, wherein the earphoneline control device includes two switching circuit, one switchingcircuit includes a resistance R1 and a switch S1, and the otherswitching circuit includes a resistance R2 and a switch S2. The switchS1 is a VOL DOWN (−) switch of the earphone line control device, theswitch S2 is a VOL UP (+) switch of the earphone line control device. Aswitch S4 is a PLAY/PAUSE switch, the control unit 40 detects whetherthe switch S1 or the switch S2 is turned off.

When the switch S1 or the switch S2 is turned on, the control unit 40detects that the seventh end 47 corresponding to the switch S1 or thesecond end 42 corresponding to the switch S2 is at low level, and thesixth end 46 corresponding to the resistance R1 or the eighth end 48corresponding to the resistance R2 is set to low level; at this moment,the resistance R1 or the resistance R2 divides voltage with an internalcircuit of the mobile phone, and forms different voltage values, themobile phone distinguishes whether the switch S1 or the switch S2 isturned on according to the voltage values, so as to implement functionsof volume regulating or previous song/next song on an earphone of a kindof operation system (such as Android).

When the switch S1 or the switch S2 is turned off, the control unit 40detects that the seventh end 47 corresponding to the switch S1 or thesecond end 42 corresponding to the switch S2 is at high level, and thesixth end 46 corresponding to the resistance R1 or the eighth end 48corresponding to the resistance R2 is set to high level, the controlunit 40 outputs a coded pulse signal via the second end 42.

When the switch S1 is turned off, the control unit 40 outputs a codedpulse signal of about 116 KHz (mid-range frequency signal of more than20 KHz); when the switch S2 is turned off, the control unit 40 outputs acoded pulse signal of about 154 KHz. The coupling filter circuit 20composed of the resistance R4 and the capacitance C2 superimposes thecoded pulse signal outputted by the control unit 40 to a main circuitand is feedback to the mobile phone connected with the earphone, themobile phone distinguishes the operation of the switch S1 or the switchS2 according to the coded pulse signals, so as to implement functions ofvolume regulating or previous song/next song on an earphone of anotheroperation system (such as IOS).

FIG. 8 shows another embodiment of the disclosure, in the embodiment,the earphone line control device further includes a custom switchcircuit composed of a switch S3 and a resistance R3. An end of theresistance R3 is connected to the power supply, the other end of theresistance R3 is connected in series with the control unit 40. An end ofthe switch S3 is connected to the control unit 40, the other end of theswitch S3 is connected to ground. When the switch S3 is turned on orturned off, the control unit 40 outputs a preset coded audio signal, thecoded audio signal is a low frequency stage signal in the range of 20-20KHz, the mobile phone connected to the earphone line control devicedecodes the coded audio signal, and different functions set by a userare implemented by running different applications programs (App), e.g.Wechat voice messages, playing wechat voice messages, taking photos,turning volume up/down, previous song/next song, screen scraping, andvoice controlling.

The embodiments described above only show a few implement manners of thepresent invention, the description is specific and detailed, but itcannot be interpreted as a limitation of the range of the presentinvention. What should be pointed out is that it is apparent to thoseskilled in the art that a variety of modifications and changes may bemade without departing from the scope of the present invention. Thus,the range of the present invention should be defined by the appendedclaims.

1-9. (canceled)
 10. An earphone line control device, comprising: a powersupply management unit, a filter unit, a switching circuit and a controlunit, wherein the switching circuit comprises a switch in series with aresistance, a first end of the power supply management unit and an endof the filter unit are both connected to a power supply, a second end ofthe power supply management unit is connected to a first end of thecontrol unit, the other end of the filter unit is connected to a secondend of the control unit, a third end of the power supply management unitis connected to ground, a third end of the control unit is connected toground, an end of the resistance is connected to the power supply, theother end of the resistance is in series with an end of the switch andconnected to a fifth end of the control unit, and the other end of theswitch is connected to a forth end of the control unit; when the switchis turned off, the control unit outputs a preset coded pulse signal. 11.The earphone line control device according to claim 10, wherein the linecontrol device further comprises a custom switch circuit, when theswitch in the custom switch circuit is turned off, the control unitoutputs a preset coded audio signal.
 12. The earphone line controldevice according to claim 11, wherein when the switches in differentswitch circuits are turned off, the control unit respectively outputsdifferent preset coded audio signals.
 13. The earphone line controldevice according to claim, wherein the power supply management unitcomprises a diode, a second resistance and a power supply capacitance;an anode of the diode, an end of the second resistance, and an end ofthe power supply capacitance are all connected to the power supply, acathode of the diode and the other end of the second resistance are bothconnected to the first end of the control unit, and the other end of thepower supply capacitance is connected to ground.
 14. An earphone linecontrol device, comprising: a power supply management unit, a filterunit, a switching circuit and a control unit, wherein the switchingcircuit comprises a switch and a resistance, a first end of the powersupply management unit and an end of the filter unit are both connectedto a power supply, a second end of the power supply management unit isconnected to a first end of the control unit, the other end of thefilter unit is connected to a second end of the control unit, a thirdend of the power supply management unit is connected to ground, a thirdend of the control unit is connected to ground, an end of the resistanceis connected to the power supply, the other end of the resistance isconnected to a sixth end of the control unit, an end of the switch isconnected to a seventh end of the control unit, and the other end of theswitch is connected to ground; when the switch is turned off, thecontrol unit outputs a preset coded pulse signal.
 15. The earphone linecontrol device according to claim 14, wherein the line control devicefurther comprises a custom switch circuit, when the switch in the customswitch circuit is turned off, the control unit outputs a preset codedaudio signal.
 16. The earphone line control device according to claim15, wherein when the switches in different switch circuits are turnedoff, the control unit respectively outputs different preset coded audiosignals.
 17. The earphone line control device according to claim 14,wherein the power supply management unit comprises a diode, a secondresistance and a power supply capacitance; an anode of the diode, an endof the second resistance and an end of the power supply capacitance areall connected to the power supply, a cathode of the diode and the otherend of the second resistance are both connected to the first end of thecontrol unit, and the other end of the capacitance is connected toground.
 18. An earphone, comprising: an audible unit, an earphone linecontrol device, a plug, and a cable receiving the audible unit and theplug, wherein the earphone line control device comprises: a power supplymanagement unit, a filter unit, a switching circuit and a control unit;the switching circuit comprises a switch in series with a resistance, afirst end of the power supply management unit and an end of the filterunit are both connected to a power supply, a second end of the powersupply management unit is connected to a first end of the control unit,the other end of the filter unit is connected to a second end of thecontrol unit, a third end of the power supply management unit isconnected to ground, a third end of the control unit is connected toground, an end of the resistance is connected to the power supply, theother end of the resistance is in series with an end of the switch andconnected to a fifth end of the control unit, and the other end of theswitch is connected to a forth end of the control unit; when the switchis turned off, the control unit outputs a preset coded pulse signal. 19.The earphone according to claim 18, wherein the line control devicefurther comprises a custom switch circuit, when the switch in the customswitch circuit is turned off, the control unit outputs a preset codedaudio signal.
 20. The earphone according to claim 19, wherein when theswitches in the different switch circuits are turned off, the controlunit respectively outputs different preset coded audio signals.
 21. Theearphone according to claim 17, wherein the power supply management unitcomprises a diode, a second resistance and a power supply capacitance;an anode of the diode, an end of the second resistance and an end of thepower supply capacitance are all connected to the power supply, acathode of the diode and the other end of the second resistance are bothconnected to the first end of the control unit, and the other end of thecapacitance is connected to ground.
 22. An earphone, comprising: anaudible unit, an earphone line control device, a plug, and a cablereceiving the audible unit and the plug, wherein the earphone linecontrol device comprises: a power supply management unit, a filter unit,a switching circuit and a control unit; the switching circuit comprisesa switch and a resistance, a first end of the power supply managementunit and an end of the filter unit are both connected to a power supply,a second end of the power supply management unit is connected to a firstend of the control unit, the other end of the filter unit is connectedto a second end of the control unit, a third end of the power supplymanagement unit is connected to ground, a third end of the control unitis connected to ground, an end of the resistance is connected to thepower supply, the other end of the resistance is connected to a sixthend of the control unit, an end of the switch is connected to a seventhend of the control unit, and the other end of the switch is connected toground; when the switch is turned off, the control unit outputs a presetcoded pulse signal.
 23. The earphone according to claim 24, wherein theline control device further comprises a custom switch circuit, when theswitch in the custom switch circuit is turned off, the control unitoutputs a preset coded audio signal.
 24. The earphone according to claim23, wherein when the switches in the different switch circuits areturned off, the control unit respectively outputs different preset codedaudio signals.
 25. The earphone according to claim 22, wherein the powersupply management unit comprises a diode, a second resistance and apower supply capacitance; an anode of the diode, an end of the secondresistance and an end of the power supply capacitance are all connectedto the power supply, a cathode of the diode and the other end of thesecond resistance are both connected to the first end of the controlunit, and the other end of the capacitance is connected to ground.